Abstract
The graphene films have been proved to be potentially useful as optical elements in fiber lasers. In this paper, the graphene films are prepared by both pulsed laser deposition (PLD) method and solution deposition method as saturable absorbers in mode-locked fiber laser. The pulse evolution process in the laser cavity is simulated by RP Fiber Power software. The influence of graphene saturable absorber with different modulation depth on pulse duration and linewidth of laser is analyzed. Finally, a ring-cavity passively mode-locked picosecond pulse Erbium-doped fiber laser based on graphene saturable absorber is constructed experimentally. At the pump power of 30mW, the laser with each saturable absorber can work stably without damage in the mode-locked state.
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